All Flashcards
What is the definition of Electric Power?
The rate at which electrical energy is transferred, converted, or dissipated within a circuit, measured in Watts.
Define Current (I).
The flow of electric charge, measured in Amperes (A).
Define Electric Potential Difference (ΔV).
The difference in electric potential between two points, measured in Volts (V). Also known as voltage.
Define Resistance (R).
A measure of the opposition to current flow in an electrical circuit, measured in Ohms (Ω).
Define Watt (W).
The SI unit of power, representing the rate of energy transfer or conversion (1 W = 1 J/s).
What are the differences between power and energy?
Power: The rate of energy use. | Energy: The total amount of work done or energy transferred.
What are the differences between series and parallel circuits (regarding total resistance)?
Series: Total resistance is the sum of individual resistances. | Parallel: Total resistance is less than the smallest individual resistance.
What are the differences between series and parallel circuits (regarding current)?
Series: Current is the same through all components. | Parallel: Current divides among the branches.
What are the differences between series and parallel circuits (regarding voltage)?
Series: Voltage divides among the components. | Parallel: Voltage is the same across all branches.
Compare and contrast a 40W bulb and a 100W bulb.
40W bulb: Uses less power, dimmer. | 100W bulb: Uses more power, brighter.
What happens when resistance increases in a circuit with constant voltage?
The current decreases.
What happens when current increases through a resistor?
The power dissipated by the resistor increases (as ).
What happens when a resistor is added in parallel to an existing resistor?
The total resistance of the circuit decreases.
What happens when a higher power bulb is used in a circuit?
The bulb will be brighter.
What happens to the total current when a resistor is added in parallel to a circuit?
The total current increases.